Astm f 2055 17

Designation F2055 − 17 Standard Test Method for Size and Squareness of Resilient Floor Tile by Dial Gage Method1 This standard is issued under the fixed designation F2055; the number immediately follo[.]

Trang 1

Designation: F2055−17

Standard Test Method for

Size and Squareness of Resilient Floor Tile by Dial Gage

This standard is issued under the fixed designation F2055; the number immediately following the designation indicates the year of

original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A

superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1 Scope

1.1 This test method covers the determination of both

dimensions (length and width) and squareness of resilient floor

tile This test method is intended for use with square tiles

ranging from a nominal 9 in (226 mm) to 40 in (1016 mm) in

dimension

1.2 The values stated in inch-pound units are to be regarded

as standard The values given in parentheses are mathematical

conversions to SI units that are provided for information only

and are not considered standard

1.3 This standard does not purport to address all of the

safety concerns, if any, associated with its use It is the

responsibility of the user of this standard to establish

appro-priate safety and health practices and determine the

applica-bility of regulatory limitations prior to use.

1.4 This international standard was developed in

accor-dance with internationally recognized principles on

standard-ization established in the Decision on Principles for the

Development of International Standards, Guides and

Recom-mendations issued by the World Trade Organization Technical

Barriers to Trade (TBT) Committee.

2 Referenced Documents

2.1 ASTM Standards:2

E177Practice for Use of the Terms Precision and Bias in

ASTM Test Methods

E691Practice for Conducting an Interlaboratory Study to

Determine the Precision of a Test Method

3 Significance and Use

3.1 Both dimension and squareness of resilient floor tile are

important considerations, because installed flooring may

ex-hibit an objectionable appearance when either or both charac-teristics deviate from established tolerances This test method provides a means of determining actual dimensions and square-ness by using a single apparatus and procedure

4 Apparatus

4.1 The apparatus shall consist of four dial gages and two reference index strips mounted on a flat bedplate in a configu-ration that, by rotation of the sample, allows the measurement

of all four sides of resilient tile samples (seeFig 1) One edge

of the bedplate is elevated to create a test surface which is offset or tilted 15 6 1 degrees from horizontal This offset applies minimal pressure to the test specimen against the longer index strip to ensure repeatable measurement A refer-ence plate representing target tile size and squareness is used to zero all dial gages (see Fig 2)

4.2 Dial Gages—The four dial gages are mounted in guide

slots that are machined into the bedplate to allow for measure-ment of various tile sizes while remaining within 10% of the corner of the tile edge (for the two corner gages and one squareness gage) or within the central 10% of the tile edge (for the center gage only) Dial gages may report measurements using either electrical or mechanical means, but they shall be graduated to read 0.001 in (0.02 mm) and have a stem travel greater than 0.25 in (6 mm) The contact foot of the dial-gage stem shall be flat 0.50–0.75 6 0.001 in (12.7–19.1 mm 6 0.2 mm) in diameter and exert a total force of not more than 3.0 6 0.1 ozf (0.83 6 0.003 N) Dial gages shall be securely positioned so that when the reference plate is in place, the contact foot is extended approximately 50% of its full travel

4.3 Index Strips—The apparatus contains 2 fixed index

strips A horizontal index strip shall be mounted parallel to and just inside the lower edge of the bedplate It shall be 1.5 6 0.1

in (38 6 3 mm) greater in length and a minimum of twice the thickness of the largest tile to be tested A second index strip shall be mounted 90° 6 10 s (1.57080 6 0.00005 rad.) to the horizontal index strip The lower end of this index strip shall be 0.125 6 0.01 in (3.1 6 0.25 mm) above the right end of the horizontal index strip and is used to locate one corner of the sample tile

4.4 Reference Plate—The reference plate shall be made to

the target dimensions of the manufactured tile The length and

1 This test method is under the jurisdiction of ASTM Committee F06 on Resilient

Floor Coverings and is the direct responsibility of F06.20Test Methods - Products

Construction/Materials.

Current edition approved May 1, 2017 Published May 2017 Originally

approved in 2000 Last previous edition approved in 2010 as F2055-10 DOI:

10.1520/F2055-17.

2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or

contact ASTM Customer Service at service@astm.org For Annual Book of ASTM

Standards volume information, refer to the standard’s Document Summary page on

the ASTM website.

Trang 2

width dimensions shall be within 6 0.001 in (0.02 mm) of the

specified dimensions of the resilient tile The reference plate

shall contain at least two sides which are perpendicular to 90°

610 s (1.57080 6 0.00005 rad.) to one another and are used

to set the squareness gage to zero

5 Specimens

5.1 The specimens shall consist of 5 full size tiles

6 Conditioning

6.1 Condition the test specimens, reference plate, and

appa-ratus a minimum of 24 h at 73.4 6 1.8°F (23 6 1°C) and

50 6 10 % relative humidity Tests shall be conducted in this

same environment Samples shall be conditioned on a flat

surface such as a table or floor surface to ensure they will

contact the bedplate uniformly during measurement

7.2 Measuring Size and Squareness—Identify one edge of

the sample tile as “Edge #1” by attaching a label to the face of the tile near that edge Place the tile into the apparatus and carefully move it into position such that it will depress all four dial gages and is in firm contact with both index strips Record the measurements on all four gages to the nearest 0.001 in (0.02 mm)

7.3 Remove the tile from the bedplate and rotate it 90° in the clockwise direction Repeat the process described in 7.2and record the four gage readings Repeat for each of the two remaining sides

7.4 After all samples have been measured, place the refer-ence gage back on the bedplate to verify that no movement of dial gages has occurred A movement of greater than 0.001 in (0.02 mm) shall be cause to repeat the measurement process

8 Calculations

8.1 Tile Size—Record all measurements in the format shown

inTable 1 Measurements shall be recorded to the nearest 0.001

in (0.02 mm) for all gages The four rotations provide two measurements of the length and width at the center and both edges of each of the tile specimens Report the dimensions and squareness for each specimen using the formulas in8.2 8.2 Perform the following calculations usingTable 1data to determine length, width, and squareness deviations for the sample tile The final report shall include tile size, test date, and length, width, and squareness deviations

Length and Width Deviation Squareness Deviation Length Deviation, Left Side = (1A+3C)/2 Corner 1 = (D1) Length Deviation, Center = (1B+3B)/2 Corner 2 = (D2) Length Deviation, Right Side = (1C+3A)/2 Corner 3 = (D3) Width Deviation, Left Side = (2A+4C)/2 Corner 4 = (D4) Width Deviation, Center = (2B+4B)/2

Width Deviation, Right Side = (2C+4A)/2

9 Report

FIG 1 Tile Measurement Apparatus

A: Tile Target Dimension 6 0.001 in (0.02 mm)

B: 90° 6 10 s (1.57080 6 0.00005 rad.)

FIG 2 Reference Plate

TABLE 1 Typical Measurement Data

Rotation No Gage A Gage B Gage C Gage D

1 0.002 0.003 –0.002 0.002

2 0.003 0.000 0.001 –0.003

4 0.003 0.002 0.005 –0.004

Trang 3

(from one operator) for each type of flooring material Practice

E691was followed for the design and analysis of the data.3

10.1.1 Repeatability Limit, (r)—Two test results obtained

within one laboratory shall be judged not equivalent if they

differ by more than the “r” value for that material; “r” is the

interval representing the critical difference between two test

results for the same material, obtained by the same operator

using the same equipment on the same day in the same

laboratory

10.1.1.1 Repeatability limits are listed inTables 2-11

10.1.2 Reproducibility Limit, (R)—Two test results shall be

judged not equivalent if they differ by more than the “R” value

for that material; “R” is the interval representing the critical

difference between two test results for the same material,

obtained by different operators using different equipment in

different laboratories

10.1.2.1 Reproducibility limits are listed inTables 2-11

10.1.3 The terms (repeatabilty limit and reproducibility

limit) are used as specified in Practice E177

10.1.4 Any judgment in accordance with10.1.1and10.1.2

would have an approximate 95 % probability of being correct

10.2 Bias—At the time of this study, there was no accepted

reference material suitable for determining the bias of this test method, therefore no statement on bias is being made 10.3 The precision statement was determined through sta-tistical examination of 1120 results, from seven laboratories,

on six materials These six tile materials were described as the following:

Material A: 12 in by 12 in VCT Material B: 12 in by 12 in VCT Material C: 18 in by 18 in Rubber Tile Material D: 18 in by 18 in Vinyl Tile Material E: 24 in by 24 in Rubber Tile Material F: 24 in by 24 in Vinyl Tile 10.4 To judge the equivalency of two test results, it is recommended to choose the material closest in characteristics

to the test material

11 Keywords

11.1 dial gage; resilient flooring; resilient tile; tile

3 Details are given in ASTM Research Report RR:F06-1008, available from

ASTM International Headquarters.

TABLE 2 Length Deviation Left (inches)

Material Average

A

x

Standard De-viation of the Lab Averages

S x ¯

Repeatability Stan-dard Deviation

S r

Reproducibility Stan-dard Deviation

S R

Repeatability Limit

r

Reproducibility Limit

R

AThe average of the laboratories’ calculated averages.

TABLE 3 Length Deviation Center (inches)

Material Average

A

x

S x ¯

S r

S R

Repeatability Limit

r

R

Trang 4

TABLE 4 Length Deviation Right (inches)

Material Average

A

x

Sx ¯

S r

S R

Repeatability Limit

r

R

TABLE 5 Width Deviation Left (inches)

Material Average

A

x

Sx ¯

S r

S R

Repeatability Limit

r

R

TABLE 6 Width Deviation Center (inches)

Material Average

A

x

Sx ¯

S r

S R

Repeatability Limit

r

R

A

The average of the laboratories’ calculated averages.

TABLE 7 Width Deviation Right (inches)

Material Average

A

x

Sx ¯

S r

S R

Repeatability Limit

r

R

Trang 5

TABLE 8 D1 Squareness Deviation (inches)

Material Average

A

x

S x ¯

S r

S R

Repeatability Limit

r

R

Material Average

A

x

S x ¯

S r

S R

Repeatability Limit

r

R

Material Average

A

x

S x ¯

S r

S R

Repeatability Limit

r

R

A

The average of the laboratories’ calculated averages.

Material Average

A

x

Sx ¯

S r

S R

Repeatability Limit

r

R

Trang 6

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned

in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and

if not revised, either reapproved or withdrawn Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org) Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/

Định dạng
Số trang	6
Dung lượng	106,68 KB

Tiêu đề	Standard Test Method for Size and Squareness of Resilient Floor Tile by Dial Gage Method
Trường học	ASTM International
Chuyên ngành	Standard Test Method
Thể loại	Standard
Năm xuất bản	2017
Thành phố	West Conshohocken